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| 003 | MX-MdCICY | ||
| 005 | 20250625164354.0 | ||
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| 090 | _aB-21391 | ||
| 245 | 1 | 0 | _aIntrinsically microporous polyimides derived from norbornane-2-spiro-?-cyclopentanone-??-spiro-2?-norbornane-5,5?,6,6?-tetracarboxylic dianhydride |
| 490 | 0 | _aPolymer. 228, 123955, 2021, DOI: 10.1016/j.polymer.2021.123955 | |
| 520 | 3 | _aHere, a series of intrinsically microporous polyimides (PIM-PIs) were prepared from norbornane-2-spiro-?-cyclopentanone-??-spiro-2?-norbornane-5,5?,6,6?-tetracarboxylic dianhydride (CpODA) and archetypal contorted diamines, and their microstructures and gas transport properties were systematically investigated and compared with those of the counterparts derived from 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA). For certain diamines, the surface areas, interchain distances, and fractional free volumes (FFV) of the CpODA-derived PIM-PIs were considerably greater than those of the 6FDA-derived ones, and were in the range of 92-567 m2 g?1, 0.575-0.607 nm, and 0.194-0.246, respectively. Consequently, the CpODA-derived PIM-PIs overall displayed higher gas permeabilities and better gas separation performances compared to the 6FDA-derived ones. In particular, CpODA-TBDA2 and CpODA-DAT showed high H2 permeabilities (>600 Barrer) and moderate H2/N2 and H2/CH4 selectivities which approached or even surpassed the corresponding 2008 Robeson upper bounds. The excellent gas separation performance of these CpODA-derived PIM-PIs may be attributed to the contorted and bulky architecture of the CpODA residue, which led to reduced inter- and intra-molecular interactions and the formation of ultramicropores of <0.7 nm. © 2021 Elsevier Ltd | |
| 650 | 1 | 4 | _aALICYCLIC DIANHYDRIDE |
| 650 | 1 | 4 | _aGAS SEPARATION PERFORMANCE |
| 650 | 1 | 4 | _aINTERCHAIN DISTANCE |
| 650 | 1 | 4 | _aPOLYIMIDES OF INTRINSIC MICROPORE |
| 650 | 1 | 4 | _aSTRUCTURE-PROPERTY RELATIONSHIP |
| 700 | 1 | 2 | _aLu Y. |
| 700 | 1 | 2 | _aHu X. |
| 700 | 1 | 2 | _aPang Y. |
| 700 | 1 | 2 | _aMiao J. |
| 700 | 1 | 2 | _aZhao J. |
| 700 | 1 | 2 | _aNie W. |
| 700 | 1 | 2 | _aWang Z. |
| 700 | 1 | 2 | _aYan J. |
| 856 | 4 | 0 |
_uhttps://drive.google.com/file/d/1ymuWioxyN0IVCTaH905zXc-R7z2cwb8h/view?usp=drive_link _zPara ver el documento ingresa a Google con tu cuenta @cicy.edu.mx |
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